This is strictly for fun, but I think it would be great if you could pick a background theme. Instead of seeing a random picture that shows the weather, it would be nice to be able to tailor the picture content to your general area, ie if you live on the coast, the pictures could show the ocean in them while still showing the appropriate weather. I could see an ocean, mountain, and plains theme set. To take it a step further, you could add some sets just for fun, like the dog picture in the featured photo on the itunes store. The dog could be wet for the rain version, or could have sun shining on him for sunny, etc.

There is an option when you set your custom background to select light text or dark text, to best display the information on your customized photo. To get to this, please open Settings (the “i” button), tap on “Change Background”, and select the buttons with the “T”. Hope this helps!